长期荷载作用下内配工字型钢方钢管混凝土偏压柱力学性能分析
|
摘要
利用ABAQUS软件建立了考虑长期荷载作用下的内配工字型钢方钢管混凝土偏压柱的数值分析模型。通过与已有试验数据对比,验证了数值模型的合理性。在此基础上,对该类新型组合柱的荷载-挠度曲线、材料应力发展和分布、材料接触应力等进行全过程分析,同时与不考虑长期荷载作用的结果进行对比,并对长期荷载作用下组合柱承载力的影响因素进行参数分析。结果表明:长期荷载作用下组合柱产生了内力重分布,加速了混凝土受拉区和钢材的塑性发展,降低了钢管和型钢对混凝土的约束作用;考虑长期荷载作用的组合柱极限承载力较一次加载的情况有所减小,对应的跨中挠度增大;在计算参数范围内,长期荷载使内配型钢方钢管混凝土偏压柱承载力降低幅度在15%以内。
A numerical analysis model of the CFST columns with inner profiled I-shaped steel subjected to long-term eccentric loading was established by using ABAQUS. The model was verified by experimental results. Based on the model,the load-deflection curves of the composite columns,the material stress and the contact stress were analyzed and compared with those of the composite columns without long-term loading. The bearing capacity of the composite columns under longterm eccentric loading was investigated on relevant parameters. The results showed that long-term loading created the internal force redistribution in composite columns,accelerated the development of concrete tensile zone and steel plastic zone,reduced the constraint effect of steel tube and inner profiled steel on core concrete. The ultimate bearing capacity of composite columns considering long-term loading was smaller than the case of complete loading,the mid-span deflection was laryor. Within the scope of the calculation parameter,the long-term loading had lowered the bearing capacity of the composite columns to less than 15%.
A numerical analysis model of the CFST columns with inner profiled I-shaped steel subjected to long-term eccentric loading was established by using ABAQUS. The model was verified by experimental results. Based on the model,the load-deflection curves of the composite columns,the material stress and the contact stress were analyzed and compared with those of the composite columns without long-term loading. The bearing capacity of the composite columns under longterm eccentric loading was investigated on relevant parameters. The results showed that long-term loading created the internal force redistribution in composite columns,accelerated the development of concrete tensile zone and steel plastic zone,reduced the constraint effect of steel tube and inner profiled steel on core concrete. The ultimate bearing capacity of composite columns considering long-term loading was smaller than the case of complete loading,the mid-span deflection was laryor. Within the scope of the calculation parameter,the long-term loading had lowered the bearing capacity of the composite columns to less than 15%.
引文
[1]朱美春,王清湘,冯秀峰.轴心受压钢骨-方钢管自密实高强混凝土短柱的力学性能研究[J].土木工程学报,2006,39(6):35-41.
[2]赵同峰,王连广.方钢管-钢骨高强混凝土压弯承载力计算[J].工程力学,2008,25(10):122-132.
[3]何益斌,肖阿林,郭健,等.钢骨-钢管自密实高强混凝土偏压柱力学性能试验研究[J].建筑结构学报,2010,31(4):102-109.
[4]王连广,赵同峰,李宏男.方钢管-钢骨高强混凝土偏压柱试验研究与理论分析[J].建筑结构学报,2010,31(7):64-71.
[5]毛文婧,史艳莉,王文达.内配型钢圆钢管混凝土轴压短柱在不同含钢率下承载力分析[J].工程力学,2017,6(34):63-70.
[6]韩林海.钢管混凝土结构:理论与实践[M].3版.北京:科学出版社,2016.
[7]李永进.考虑长期荷载作用影响时钢管混凝土柱的力学性能研究[D].福州:福州大学,2009.
[8]王文达,邹爱华,张鹏鹏.长期荷载作用下矩形钢管混凝土轴压短柱力学性能[J].公路交通科技,2011,28(7):73-78.
[9] LIU H,WANG Y X,HE M H,et al.Strength and Ductility Performance of Concrete-Filled Steel Tubular Columns After Long-Term Service Loading[J].Engineering Structures,2015(100):308-325.
[10] HOU C,HAN L H,ZHAO X L. Full-Range Analysis on Square CFST Stub Columns and Beams Under Loading and Chloride Corrosion[J].Thin-Walled Structures,2013(68):50-64.
[11] WANG Y Y,GENG Y,GIANLUCA R,et al.Time-Dependent Behavior of Expansive Concrete-Filled Steel Tubular Columns[J].Journal of Constructional Steel Research,2011(67):471-483.
[12]史艳莉,陈彦玉,王文达.长期荷载作用下内置钢骨钢管混凝土轴压短柱受力性能研究[J].建筑科学,2016,32(9):61-68.
[13] ABAQUS Inc. ABAQUS User Subroutines Reference Manual Version 6.10[M/OL]. Rhode Island,USA:ABAQUS Inc,2010.http://ivt-abaqusdoc.ivt.ntnu.no:2080/v6.10/books/sub/default.htm? startat=ch01s01asb05.html.
[14] ACI.Prediction of Creep,Shrinkage and Temperature Effects in Concrete Structures:ACI 209R-1992[S]. Farmington Hills:ACI,1992:51-93.
[15]林挺伟.脱空缺陷对长期荷载作用下圆钢管混凝土构件静力性能的影响研究[J].建筑钢结构进展,2018,20(2):74-78.
[2]赵同峰,王连广.方钢管-钢骨高强混凝土压弯承载力计算[J].工程力学,2008,25(10):122-132.
[3]何益斌,肖阿林,郭健,等.钢骨-钢管自密实高强混凝土偏压柱力学性能试验研究[J].建筑结构学报,2010,31(4):102-109.
[4]王连广,赵同峰,李宏男.方钢管-钢骨高强混凝土偏压柱试验研究与理论分析[J].建筑结构学报,2010,31(7):64-71.
[5]毛文婧,史艳莉,王文达.内配型钢圆钢管混凝土轴压短柱在不同含钢率下承载力分析[J].工程力学,2017,6(34):63-70.
[6]韩林海.钢管混凝土结构:理论与实践[M].3版.北京:科学出版社,2016.
[7]李永进.考虑长期荷载作用影响时钢管混凝土柱的力学性能研究[D].福州:福州大学,2009.
[8]王文达,邹爱华,张鹏鹏.长期荷载作用下矩形钢管混凝土轴压短柱力学性能[J].公路交通科技,2011,28(7):73-78.
[9] LIU H,WANG Y X,HE M H,et al.Strength and Ductility Performance of Concrete-Filled Steel Tubular Columns After Long-Term Service Loading[J].Engineering Structures,2015(100):308-325.
[10] HOU C,HAN L H,ZHAO X L. Full-Range Analysis on Square CFST Stub Columns and Beams Under Loading and Chloride Corrosion[J].Thin-Walled Structures,2013(68):50-64.
[11] WANG Y Y,GENG Y,GIANLUCA R,et al.Time-Dependent Behavior of Expansive Concrete-Filled Steel Tubular Columns[J].Journal of Constructional Steel Research,2011(67):471-483.
[12]史艳莉,陈彦玉,王文达.长期荷载作用下内置钢骨钢管混凝土轴压短柱受力性能研究[J].建筑科学,2016,32(9):61-68.
[13] ABAQUS Inc. ABAQUS User Subroutines Reference Manual Version 6.10[M/OL]. Rhode Island,USA:ABAQUS Inc,2010.http://ivt-abaqusdoc.ivt.ntnu.no:2080/v6.10/books/sub/default.htm? startat=ch01s01asb05.html.
[14] ACI.Prediction of Creep,Shrinkage and Temperature Effects in Concrete Structures:ACI 209R-1992[S]. Farmington Hills:ACI,1992:51-93.
[15]林挺伟.脱空缺陷对长期荷载作用下圆钢管混凝土构件静力性能的影响研究[J].建筑钢结构进展,2018,20(2):74-78.